1. Why are they called Giants?

2. Are We Significant?

3. Is the Sun Significant?

4. The Sun Disappears!

5. The Outer Planets “Gas Giants”
The four planets farthest away from the Sun are called the outer planets.
These planets are:
Jupiter Saturn Uranus Neptune

6. Why “Gas Giants”
These Planets do not have a hard rocky surface like Earth does.
They all are much bigger than Earth.

7. Why are they so big?
They are made of mostly Hydrogen and helium(balloon) gases, and a few other gases.
They are so far from the Sun that the gases are very cold and liquid.
They are not heavy and solid like rocks.

8. Jupiter It is our biggest planet, over 1000 times bigger than Earth.
It is 400 times farther from the Sun than earth and so cold that its hydrogen and helium gases turn to liquid.
Jupiter’s moon Europa is covered with ice and maybe life forms.

9. Saturn
It is the second largest planet and has the largest and most visable rings.
Like Jupiter,it is made up of liquid hydrogen and helium liquid gases.
Its rings are made from ice and rock from an exploding Moon.

10. Uranus
It is twice as far from the Sun as Saturn and only 4 times bigger than earth.
It spins on its side because its axis is horizontal.
It’s blue-green color comes from the frozen methane gases trapped in the helium/hydrogen gases.

11. Neptune The smallest and farthest gas planet from the sun.
It also appears blue because of the frozen liquid methane gas on its surface.

12. Pluto
Has a solid surface and is much smaller and denser than the other outer planets
Has at least one moon Charon which is large and considered a double planet

13. Is Pluto A Planet? It is very small
There are other things in space that are larger than Pluto.
It is highly published as a planet
At one time was removed from the text as a planet
It is a body worthy of study (video)